[gdal-dev] Re: reprojecting a georeferenced image (PNG, JPG)

[Christian Müller]

run the program with: 

gdlawarp-co "WORLDFILE=YES" .... 

 

Tim Michelsen writes: 

> Hello,
> I have a PNG file with some transparent areas.
> I used QGIS to georeference the file using the latlon/WGS84 projection settings.
> Within this process, a world file (*.wld) and a point file where created. 
> 
> Now, I'd like to reproject this image into another projection. 
> 
> How do I have run gadlwarp that:
> * the transparen regions in the PNG are being maintained tranparent and
> * a new word file is written which corresponds to the new projection settings? 
> 
> I tried to run the program with "-worldfile=yes" but no new worlfile was written. 
> 
> Thanks in advance,
> Timmie 
> 
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